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From:   Heiko =?ISO-8859-1?Q?St=FCbner?= <heiko@sntech.de>
To:     devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org,
        Michael Riesch <michael.riesch@wolfvision.net>,
        Arnd Bergmann <arnd@kernel.org>,
        Ahmad Fatoum <a.fatoum@pengutronix.de>
Cc:     Rob Herring <robh+dt@kernel.org>, Liang Chen <cl@rock-chips.com>,
        Peter Geis <pgwipeout@gmail.com>,
        Simon Xue <xxm@rock-chips.com>,
        Pengutronix Kernel Team <kernel@pengutronix.de>
Subject: Re: [PATCH] arm64: dts: rockchip: move aliases to rk356x dtsi
Date:   Wed, 22 Sep 2021 18:51:08 +0200
Message-ID: <8375423.X1v87zm6sT@diego>
In-Reply-To: <ce3f2ece-4c30-ad01-fd51-8a3e46297234@pengutronix.de>
References: <20210917110528.24454-1-michael.riesch@wolfvision.net> <2397289.mVTDCA6dLn@diego> <ce3f2ece-4c30-ad01-fd51-8a3e46297234@pengutronix.de>
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Hi Ahmad,

Am Mittwoch, 22. September 2021, 15:40:33 CEST schrieb Ahmad Fatoum:
> Hello Heiko,
> 
> On 17.09.21 14:01, Heiko St?bner wrote:
> > Hi Michael,
> > 
> > Am Freitag, 17. September 2021, 13:05:28 CEST schrieb Michael Riesch:
> >> In order to ensure deterministic probe order over different boards,
> >> move the aliases of on-SoC components to the corresponding dtsi
> >> files.
> > 
> > please read the git history on the other Rockchip SoCs. We just moved
> > the aliases on them _to_ the board-files, as requested by
> > arm-soc maintainers ;-)
> 
> [Adding Arnd to CC]
> 
> For old boards, changing the aliases may introduce breakage that outweighs
> the benefit of having consistent numbering. This doesn't seem to apply here:
> rk3566.dtsi is a new device tree not yet in v5.15-rc2 and rk3568 is new in
> v5.14 and has only one board partially supported, so if we were to do this
> change we should do it now. Boards will still be free to override the aliases,
> but those that don't will have consistent numbering regardless of whether
> nodes are enabled, cards are detected or probe order.

the request from Arnd was actually to move things like mmc aliases _to_
board files away from the soc-level dtsi. Supposedly to prevent holes in
the numbering for example if the sdmmc is mmc0, emmc is mmc1,
but sdmmc not used on a board, which would then leave mmc0 empty .


Heiko


> > Heiko
> > 
> > 
> >>
> >> Signed-off-by: Michael Riesch <michael.riesch@wolfvision.net>
> >> ---
> >>  arch/arm64/boot/dts/rockchip/rk3566-quartz64-a.dts | 6 ------
> >>  arch/arm64/boot/dts/rockchip/rk3566.dtsi           | 4 ++++
> >>  arch/arm64/boot/dts/rockchip/rk3568-evb1-v10.dts   | 7 -------
> >>  arch/arm64/boot/dts/rockchip/rk3568.dtsi           | 5 +++++
> >>  arch/arm64/boot/dts/rockchip/rk356x.dtsi           | 2 ++
> >>  5 files changed, 11 insertions(+), 13 deletions(-)
> >>
> >> diff --git a/arch/arm64/boot/dts/rockchip/rk3566-quartz64-a.dts b/arch/arm64/boot/dts/rockchip/rk3566-quartz64-a.dts
> >> index a244f7b87e38..156bbb8aa4c4 100644
> >> --- a/arch/arm64/boot/dts/rockchip/rk3566-quartz64-a.dts
> >> +++ b/arch/arm64/boot/dts/rockchip/rk3566-quartz64-a.dts
> >> @@ -10,12 +10,6 @@
> >>  	model = "Pine64 RK3566 Quartz64-A Board";
> >>  	compatible = "pine64,quartz64-a", "rockchip,rk3566";
> >>  
> >> -	aliases {
> >> -		ethernet0 = &gmac1;
> >> -		mmc0 = &sdmmc0;
> >> -		mmc1 = &sdhci;
> >> -	};
> >> -
> >>  	chosen: chosen {
> >>  		stdout-path = "serial2:1500000n8";
> >>  	};
> >> diff --git a/arch/arm64/boot/dts/rockchip/rk3566.dtsi b/arch/arm64/boot/dts/rockchip/rk3566.dtsi
> >> index 3839eef5e4f7..c1b3841caa77 100644
> >> --- a/arch/arm64/boot/dts/rockchip/rk3566.dtsi
> >> +++ b/arch/arm64/boot/dts/rockchip/rk3566.dtsi
> >> @@ -4,6 +4,10 @@
> >>  
> >>  / {
> >>  	compatible = "rockchip,rk3566";
> >> +
> >> +	aliases {
> >> +		ethernet0 = &gmac1;
> >> +	};
> >>  };
> >>  
> >>  &power {
> >> diff --git a/arch/arm64/boot/dts/rockchip/rk3568-evb1-v10.dts b/arch/arm64/boot/dts/rockchip/rk3568-evb1-v10.dts
> >> index 184e2aa2416a..218f85af730c 100644
> >> --- a/arch/arm64/boot/dts/rockchip/rk3568-evb1-v10.dts
> >> +++ b/arch/arm64/boot/dts/rockchip/rk3568-evb1-v10.dts
> >> @@ -13,13 +13,6 @@
> >>  	model = "Rockchip RK3568 EVB1 DDR4 V10 Board";
> >>  	compatible = "rockchip,rk3568-evb1-v10", "rockchip,rk3568";
> >>  
> >> -	aliases {
> >> -		ethernet0 = &gmac0;
> >> -		ethernet1 = &gmac1;
> >> -		mmc0 = &sdmmc0;
> >> -		mmc1 = &sdhci;
> >> -	};
> >> -
> >>  	chosen: chosen {
> >>  		stdout-path = "serial2:1500000n8";
> >>  	};
> >> diff --git a/arch/arm64/boot/dts/rockchip/rk3568.dtsi b/arch/arm64/boot/dts/rockchip/rk3568.dtsi
> >> index 2fd313a295f8..dd0e800cf752 100644
> >> --- a/arch/arm64/boot/dts/rockchip/rk3568.dtsi
> >> +++ b/arch/arm64/boot/dts/rockchip/rk3568.dtsi
> >> @@ -8,6 +8,11 @@
> >>  / {
> >>  	compatible = "rockchip,rk3568";
> >>  
> >> +	aliases {
> >> +		ethernet0 = &gmac0;
> >> +		ethernet1 = &gmac1;
> >> +	};
> >> +
> >>  	qos_pcie3x1: qos@fe190080 {
> >>  		compatible = "rockchip,rk3568-qos", "syscon";
> >>  		reg = <0x0 0xfe190080 0x0 0x20>;
> >> diff --git a/arch/arm64/boot/dts/rockchip/rk356x.dtsi b/arch/arm64/boot/dts/rockchip/rk356x.dtsi
> >> index e42fbac6147b..bb0540d3008c 100644
> >> --- a/arch/arm64/boot/dts/rockchip/rk356x.dtsi
> >> +++ b/arch/arm64/boot/dts/rockchip/rk356x.dtsi
> >> @@ -29,6 +29,8 @@
> >>  		i2c3 = &i2c3;
> >>  		i2c4 = &i2c4;
> >>  		i2c5 = &i2c5;
> >> +		mmc0 = &sdmmc0;
> >> +		mmc1 = &sdhci;
> >>  		serial0 = &uart0;
> >>  		serial1 = &uart1;
> >>  		serial2 = &uart2;
> >>
> > 
> > 
> > 
> > 
> > 
> > _______________________________________________
> > linux-arm-kernel mailing list
> > linux-arm-kernel@lists.infradead.org
> > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
> > 
> 
> 
>